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密肋楼盖在地下车库设计中的应用及注意事项

建筑结构 2022年第S01期52卷 744-750页

作者：王伟良上海中建建筑设计院有限公司上海200135

以某地下车库密肋楼盖为案例(该案例楼盖采用柔性支承楼盖),采用ETABS软件对其进行分析。首先,对柔性支承楼盖的受力特征进行了分析,主要关注密肋楼板及主梁的弯矩值;然后,为研究主梁对密肋楼盖的影响,对柔性支承楼盖与柱支承楼盖进行... 详细信息

以某地下车库密肋楼盖为案例(该案例楼盖采用柔性支承楼盖),采用ETABS软件对其进行分析。首先,对柔性支承楼盖的受力特征进行了分析,主要关注密肋楼板及主梁的弯矩值;然后,为研究主梁对密肋楼盖的影响,对柔性支承楼盖与柱支承楼盖进行了对比分析,并对主梁刚度变化的影响进行了分析;通常传统楼盖设计不考虑楼板刚度,仅考虑楼板的导荷,为研究传统楼盖设计与柔性支承楼盖的区别,对两者进行了对比分析,并对主梁刚度的变化进行了分析;最后,对柔性支承楼盖的设计提出了几点注意事项。通过分析知,从受力的角度出发,柔性支承楼盖是比较合理的一种楼盖形式,主梁的设置对柔性支承楼盖是有利的,且主梁刚度越大越有利。

关键词：密肋楼盖受力特征主梁刚度传统设计

Shadow obstacle model for realistic corner-turning behavior in crowd simulation

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 200-211页

作者： Gao-qi HE Yi JIN Qi CHEN Zhen LIU Wen-hui YUE Xing-jian LU Department of Computer Science and Engineering East China University of Science and Technology Shanghai 200237 China MOE Key Laboratory of Geographic Information Science East China Normal University Shanghai 200241 China State Key Laboratory of Virtual Reality Technology and Systems Beihang University Beijing 100191 China College of Information Science and Technology Ningbo University Ningbo 315211 China

This paper describes a novel model known as the shadow obstacle model to generate a realistic corner-turning behavior in crowd simulation. The motivation for this model comes from the observation that people tend to choose a safer route rather than a shorter one when turning a corner. To calculate a safer route, an optimization method is proposed to generate the corner-turning rule that maximizes the viewing range for the agents. By combining psychological and physical forces together, a full crowd simulation framework is established to provide a more realistic crowd simulation. We demonstrate that our model produces a more realistic corner-turning behavior by comparison with real data obtained from the experiments. Finally, we perform parameter analysis to show the believability of our model through a series of experiments.

关键词：量子细胞自动机可逆电路传统设计奇偶校验发生器校验器元胞自动机低功率

Fast implementation of kernel simplex volume analysis based on modified Cholesky factorization for endmember extraction

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 250-257页

作者： Jing LI Xiao-run LI Li-jiao WANG Liao-ying ZHAO College of Electrical Engineering Zhejiang University Institute of Computer Application Technology Hangzhou Dianzi University

Endmember extraction is a key step in the hyperspectral image analysis process. The kernel new simplex growing algorithm(KNSGA), recently developed as a nonlinear alternative to the simplex growing algorithm(SGA), has proven a promising endmember extraction technique. However, KNSGA still suffers from two issues limiting its application. First, its random initialization leads to inconsistency in final results; second, excessive computation is caused by the iterations of a simplex volume calculation. To solve the first issue, the spatial pixel purity index(SPPI) method is used in this study to extract the first endmember, eliminating the initialization dependence. A novel approach tackles the second issue by initially using a modified Cholesky factorization to decompose the volume matrix into triangular matrices, in order to avoid directly computing the determinant tautologically in the simplex volume formula. Theoretical analysis and experiments on both simulated and real spectral data demonstrate that the proposed algorithm significantly reduces computational complexity, and runs faster than the original algorithm.

关键词：量子细胞自动机可逆电路传统设计奇偶校验发生器校验器元胞自动机低功率

A survey of photon mapping state-of-the-art research and future challenges

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 185-199页

作者： Chun-meng KANG Lu WANG Yan-ning XU Xiang-xu MENG Department of Computer Science and Technology Shandong University Engineering Research Center of Digital Media Technology Ministry of Education

Global illumination is the core part of photo-realistic rendering. The photon mapping algorithm is an effective method for computing global illumination with its obvious advantage of caustic and color bleeding rendering. It is an active research field that has been developed over the past two decades. The deficiency of precise details and efficient rendering are still the main challenges of photon mapping. This report reviews recent work and classifies it into a set of categories including radiance estimation, photon relaxation, photon tracing, progressive photon mapping, and parallel methods. The goals of our report are giving readers an overall introduction to photon mapping and motivating further research to address the limitations of existing methods.

关键词：量子细胞自动机可逆电路传统设计奇偶校验发生器校验器元胞自动机低功率

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 212-223页

作者： Xiao-hu MA Meng YANG Zhao ZHANG School of Computer Science and Technology Soochow University State Key Laboratory for Novel Software Technology Nanjing University

The feature extraction algorithm plays an important role in face recognition. However, the extracted features also have overlapping discriminant information. A property of the statistical uncorrelated criterion is that it eliminates the redundancy among the extracted discriminant features, while many algorithms generally ignore this property. In this paper, we introduce a novel feature extraction method called local uncorrelated local discriminant embedding(LULDE). The proposed approach can be seen as an extension of a local discriminant embedding(LDE)framework in three ways. First, a new local statistical uncorrelated criterion is proposed, which effectively captures the local information of interclass and intraclass. Second, we reconstruct the affinity matrices of an intrinsic graph and a penalty graph, which are mentioned in LDE to enhance the discriminant property. Finally, it overcomes the small-sample-size problem without using principal component analysis to preprocess the original data, which avoids losing some discriminant information. Experimental results on Yale, ORL, Extended Yale B, and FERET databases demonstrate that LULDE outperforms LDE and other representative uncorrelated feature extraction methods.

关键词：量子细胞自动机可逆电路传统设计奇偶校验发生器校验器元胞自动机低功率

Design and simulation of a standing wave oscillator based PLL

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 258-264页

作者： Wei ZHANG You-de HU Li-rong ZHENG State Key Lab of ASIC & System Fudan University Pack Vinn Excellence Center School of ICTRoyal Institute of Technology (KTH) Eletrum 229

A standing wave oscillator(SWO) is a perfect clock source which can be used to produce a high frequency clock signal with a low skew and high reliability. However, it is difficult to tune the SWO in a wide range of frequencies. We introduce a frequency tunable SWO which uses an inversion mode metal-oxide-semiconductor(IMOS) field-effect transistor as a varactor, and give the simulation results of the frequency tuning range and power dissipation. Based on the frequency tunable SWO, a new phase locked loop(PLL) architecture is presented. This PLL can be used not only as a clock source, but also as a clock distribution network to provide high quality clock signals. The PLL achieves an approximately 50% frequency tuning range when designed in Global Foundry 65 nm 1P9 M complementary metal-oxide-semiconductor(CMOS) technology, and can be used directly in a high performance multi-core microprocessor.

关键词：量子细胞自动机可逆电路传统设计奇偶校验发生器校验器元胞自动机低功率

Quantum-dot cellular automata based reversible low power parity generator and parity checker design for nanocommunication

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 224-236页

作者： Jadav Chandra DAS Debashis DE Department of Computer Science and Engineering West Bengal University of Technology Department of Physics University of Western Australia

Quantum-dot cellular automata(QCA) is an emerging area of research in reversible computing. It can be used to design nanoscale circuits. In nanocommunication, the detection and correction of errors in a received message is a major factor. Besides, device density and power dissipation are the key issues in the nanocommunication architecture. For the first time, QCA-based designs of the reversible low-power odd parity generator and odd parity checker using the Feynman gate have been achieved in this study. Using the proposed parity generator and parity checker circuit, a nanocommunication architecture is proposed. The detection of errors in the received message during transmission is also explored. The proposed QCA Feynman gate outshines the existing ones in terms of area, cell count, and delay. The quantum costs of the proposed conventional reversible circuits and their QCA layouts are calculated and compared, which establishes that the proposed QCA circuits have very low quantum cost compared to conventional designs. The energy dissipation by the layouts is estimated, which ensures the possibility of QCA nano-device serving as an alternative platform for the implementation of reversible circuits. The stability of the proposed circuits under thermal randomness is analyzed, showing the operational efficiency of the circuits. The simulation results of the proposed design are tested with theoretical values, showing the accuracy of the circuits. The proposed circuits can be used to design more complex low-power nanoscale lossless nanocommunication architecture such as nano-transmitters and nano-receivers.

关键词：量子细胞自动机可逆电路传统设计奇偶校验发生器校验器元胞自动机低功率

A consensus model for group decision making under interval type-2 fuzzy environment

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Frontiers of Information Technology & Electronic Engineering 2016年第3期17卷 237-249页

作者： Xiao-xiong ZHANG Bing-feng GE Yue-jin TAN College of Information System and Management National University of Defense Technology Changsha 410073 China

We propose a new consensus model for group decision making(GDM) problems, using an interval type-2 fuzzy environment. In our model, experts are asked to express their preferences using linguistic terms characterized by interval type-2 fuzzy sets(IT2 FSs), because these can provide decision makers with greater freedom to express the vagueness in real-life situations. Consensus and proximity measures based on the arithmetic operations of IT2 FSs are used simultaneously to guide the decision-making process. The majority of previous studies have taken into account only the importance of the experts in the aggregation process, which may give unreasonable results. Thus, we propose a new feedback mechanism that generates different advice strategies for experts according to their levels of importance. In general, experts with a lower level of importance require a larger number of suggestions to change their initial preferences. Finally, we investigate a numerical example and execute comparable models and ours, to demonstrate the performance of our proposed model. The results indicate that the proposed model provides greater insight into the GDM process.

关键词：量子细胞自动机可逆电路传统设计奇偶校验发生器校验器元胞自动机低功率

大型海水化淡工程全过程BIM正向设计的探索与应用

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土木建筑工程信息技术 2023年第6期15卷 64-69页

作者：张保平贾德登尹丞玉王基业中国建筑工程(香港)有限公司中国香港999077

本文通过对将军澳海水化淡厂BIM正向设计流程的具体介绍,详细地阐述了项目BIM正向设计工作流程、BIM应用点以及项目CDE的创建和使用等。并通过对BIM正向参数化设计与传统设计的对比,突出了BIM正向设计可实现设计建造一体化、设计信息传... 详细信息

本文通过对将军澳海水化淡厂BIM正向设计流程的具体介绍,详细地阐述了项目BIM正向设计工作流程、BIM应用点以及项目CDE的创建和使用等。并通过对BIM正向参数化设计与传统设计的对比,突出了BIM正向设计可实现设计建造一体化、设计信息传递高效完整、项目设计直观及图纸更新方便快捷等优势,也暴露了传统设计虽然使用BIM技术,却不改变传统设计本质,只是一味的使用BIM技术的单一功能辅助传统设计,并且使设计与施工脱节的弊端。同时,本文借助BIM正向设计的优势,介绍了建筑信息由设计阶段高效完整传递至建造与运营阶段,在各个阶段建筑信息不断修正与丰富等特点。

关键词： BIM技术正向设计通用数据环境(CDE) BIM 360 传统设计